tests/simple/gk-deploy: Don't test invalid namespace w/invalid-cli
tests/simple/gk-deploy: Don't test invalid namespace w/invalid-cli

Since we already tested unknown-cli previously we don't need to test it
again.

Signed-off-by: Jose A. Rivera <2a0958b6fecb909a38a254361e8d9708c4487d67@redhat.com>

gluster/gluster-kubernetes,gluster/gluster-kubernetes